RegExp macro assembler clean up.

src/mips/regexp-macro-assembler-mips.h

Index: src/mips/regexp-macro-assembler-mips.h
diff --git a/src/mips/regexp-macro-assembler-mips.h b/src/mips/regexp-macro-assembler-mips.h
index 3ad64f9aeb2117b53cb9fdb85c58fe2739501b8a..86ae4d45eebe763142acdb04028d5141b45331f9 100644
--- a/src/mips/regexp-macro-assembler-mips.h
+++ b/src/mips/regexp-macro-assembler-mips.h
@@ -55,10 +55,6 @@ class RegExpMacroAssemblerMIPS: public NativeRegExpMacroAssembler {
                                       Label* on_equal);
   virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
   virtual void CheckCharacterLT(uc16 limit, Label* on_less);
-  virtual void CheckCharacters(Vector<const uc16> str,
-                               int cp_offset,
-                               Label* on_failure,
-                               bool check_end_of_string);
   // A "greedy loop" is a loop that is both greedy and with a simple
   // body. It has a particularly simple implementation.
   virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);